diff --git a/valuable/src/listable.rs b/valuable/src/listable.rs
index fd1dec62..52413825 100644
--- a/valuable/src/listable.rs
+++ b/valuable/src/listable.rs
@@ -69,6 +69,7 @@ slice! {
     (T: Valuable) alloc::boxed::Box<[T]>,
     #[cfg(feature = "alloc")]
     (T: Valuable) alloc::rc::Rc<[T]>,
+    #[cfg(not(valuable_no_atomic_cas))]
     #[cfg(feature = "alloc")]
     (T: Valuable) alloc::sync::Arc<[T]>,
     (T: Valuable, const N: usize) [T; N],